Heritage Trilogy Series by Ian Douglas

The Year is 2040.The Marines have landed on Mars to guard the unearthed secrets of an ancient and dangerous alien race: Ourselves.Scientists have discovered something astonishing in the subterranean ruins of a sprawling Martian city: startling evidence of an alternative history that threatens to split humanity into opposing factions and plunge the Earth into chaos and war... moreThe Year is 2040.The Marines have landed on Mars to guard the unearthed secrets of an ancient and dangerous alien race: Ourselves.Scientists have discovered something astonishing in the subterranean ruins of a sprawling Martian city: startling evidence of an alternative history that threatens to split humanity into opposing factions and plunge the Earth into chaos and war. The USMC -- a branch of a military considered, until just recently, to be obsolete -- has dispatched the Marine Mars Expeditionary Force, a thirty-man weapons platoon, to the Red Planet to protect American civilians and interest with lethal force if necessary.Because great powers are willing to devastate a world in order to keep an ancient secret buried. Because something that was hidden in the Martian dust for half a million years has just been unearthed . . . something that calls into question every belief that forms the delicate foundation of civilization . . .Something inexplicably human. less

The revelations on Mars -- a half-million year-old legacy of the vanished star-traveling Builders -- have fed the flames of catastrophic war. A beleaguered United States and its Russian and Japanese allies struggle to hold their own against the indomitable forces of the enemy United Nations. The bloody conflict that has swept over the home planet now rages across the blackness of space -- with the U.S. Marine Corps in the vanguard, leading the charge as always... moreThe revelations on Mars -- a half-million year-old legacy of the vanished star-traveling Builders -- have fed the flames of catastrophic war. A beleaguered United States and its Russian and Japanese allies struggle to hold their own against the indomitable forces of the enemy United Nations. The bloody conflict that has swept over the home planet now rages across the blackness of space -- with the U.S. Marine Corps in the vanguard, leading the charge as always.But Mars is not the sole repository of alien wonders. The Earth's moon hides unsettling mysteries of its own-and dangerous secrets pointing toward an unstoppable threat advancing from somewhere beyond the solar system. And as scientists on both sides ract to utilize technology they have only barely begun to comprehend, the UN makes the opening move in a gambit that could end the hostilities quickly and decisively by bringing about the death of millions...without the aid of alien-inspired weaponry.A bad situation worsens by the nanosecond. And that means it's time to call in the Marines -- to make a life or death stand on the gray shores of Luna. less

2040: Ruins of ancient civilization uncovered on Mars reveal startling truths about the creation of humankind.2042: In the gray dust of the Earth's Moon, an extinct enslaving race left behind more answers, more questions...and a grim warning.2067: As Earth's warring factions clash in space for scraps of alien technology, a strange artifact lies trapped beneath the ice-locked oceans of Europa: a machine that holds the key to the final human destiny... more2040: Ruins of ancient civilization uncovered on Mars reveal startling truths about the creation of humankind.2042: In the gray dust of the Earth's Moon, an extinct enslaving race left behind more answers, more questions...and a grim warning.2067: As Earth's warring factions clash in space for scraps of alien technology, a strange artifact lies trapped beneath the ice-locked oceans of Europa: a machine that holds the key to the final human destiny.It is called "The Singer" for the eerie tone it emits.An artificial intelligence built eons ago, it may ultimately solve the mystery of the vanished alien races responsible for the birth and development of humanity. But after decades of war, the hostile nations of Earth care more for power than for knowledge. And now all that stands between the coveted Al and an all-out Chinese assault is a vastly outnumbered contingent of U.S. marines, dug in beneath the baleful red eye of Jupiter. As terrifying events light years distant begin to converge---with confrontation imminent and annihilation inevitable---a secret history of creation and doom must at long last be contended with...if humankind is to finally claim its glorious heritage among the stars.2040: Ruins of ancient civilization uncovered on Mars reveal startling truths about the creation of humankind.2042: In the gray dust of the Earth's Moon, an extinct enslaving race left behind more answers, more questions...and a grim warning.2067: As Earth's warring factions clash in space for scraps of alien technology, a strange artifact lies trapped beneath the ice-locked oceans of Europa: a machine that holds the key to the final human destiny.It is called "The Singer" for the eerie tone it emits. An artificial intelligence built eons ago, it may ultimately solve the mystery of the vanished alien races responsible for the birth and development of humanity. But after decades of war, the hostile nations of Earth care more for power than for knowledge. And now all that stands between the coveted Al and an all-out Chinese assault is a vastly outnumbered contingent of U.S. marines, dug in beneath the baleful red eye of Jupiter. As terrifying events light years distant begin to converge---with confrontation imminent and annihilation inevitable---a secret history of creation and doom must at long last be contended with...if humankind is to finally claim its glorious heritage among the stars.2040: Ruins of ancient civilization uncovered on Mars reveal startling truths about the creation of humankind.2042: In the gray dust of the Earth's Moon, an extinct enslaving race left behind more answers, more questions...and a grim warning.2067: As Earth's warring factions clash in space for scraps of alien technology, a strange artifact lies trapped beneath the ice-locked oceans of Europa: a machine that holds the key to the final human destiny.It is called "The Singer" for the eerie tone it emits. An artificial intelligence built eons ago, it may ultimately solve the mystery of the vanished alien races responsible for the birth and development of humanity. But after decades of war, the hostile nations of Earth care more for power than for knowledge. And now all that stands between the coveted Al and an all-out Chinese assault is a vastly outnumbered contingent of U.S. marines, dug in beneath the baleful red eye of Jupiter. As terrifying events light years distant begin to converge---with confrontation imminent and annihilation inevitable---a secret history of creation and doom must at long last be contended with...if humankind is to finally claim its glorious heritage among the stars. less